I,m working up loads for my 22 BRX shooting 90gn sierras and have been using H4350,actualy AR2209). I usualy like Vihta Vouri powders due to there cleaner burning. Has anyone compared N150 to H4350 for consistency or clean burning? Also,how does N550 compare? Is it peaky at high presures,is it as consistent as N150? I would rather give up velocity for low ES and clean burning. Which do you prefer?